Electric time-switch.



c. E. BUNKER. ELEGTRIO TIME SWITCH. APPLICATION FILED SEPT. '16, 1909.

Patented June 21,1910.

IIIIIIIIIIIIiIIIIIA QWMo t G. E. BUNKER.

ELECTRIC TIME SWITCH.

nrmonzon FILED sEi 'r.1s, 1909.

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CAREY E. BUNKER, OF OREGON, MISSOUIR ELnc'rnic TIME-SWITCH.

Specification of Letters Patent. Patented J ne 21, 1910.

Application filed September 16, 1909. Serial No. 518,054.

To all whom it may concern:

Be it known that I, CAREY E. BUNKER, a

" citizen of the United States, residing at Orehe to gen, in the countyof Holt and State of Missouri, have invented certain new and usefulImprovements in Electric Time-Switches; and I do declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

This invention relates to improvements in electric time switches.

One object of the invention is to provide means for automaticallyturning on and olt an electric switch at a predetermined time. 'Anotherfobject is to rovide a simple and roved electric switcii mechanismadapted applied to and actuated by the hour hand shaft of a clock workswhereby the switch will be operated at the proper time, means beingprovided whereby the operating devices may be easily adjusted-or setfrom the outside of the clock to actuate the switch at any'desired time.

With. the foregoing and other objects in view, theinvention consistsofcertain novel features oficonstruction, combination and arran ement ofparts, as will be more fully descri d and particularly pointed out inthe appended claims.

In the accompanying drawings, Figure 1 is a front View of a clock havingmy invention applied thereto; Fig. 2 is a side view of the same, partlyin section; Fig. 3 is a cross sectional view on the line 38 of Fig. 2,showing the switch in an operative position; Fig. {is a similar viewshowing the switch in an inoperative position, just after having beenreleased; Fig. 5 is a detail view of the stationar contact plate of theswitch, showing the manner in which the same is connected to its base ofinsulating material.

' Fig 6 is a detail view showing another form of connection for thecontact plate. Fig. 7 is a similar view showing a modified constructionof the connection shown in Fig. (3. Fig. 8 is a detail perspective viewof still another form of connection for the contact plate.

Referring more particularly to the draw- F in s, 1 denotes a clock whichmay be of any suitable construction, to which are connected theterminals of an electric circuit. terminals of the circuit may beconnected to the clock in'any suitable manner and in the Thepresentinstance I show theclock as being provided on one side with a screw plug2 having in its outer end a contact late 3 which is connected by a shortcon ucting wire 1 to a contact plate 5 arranged within the casing of theclock. The shell of the plug and the clock casing and metallic partsthereof serve as the other conductor .or the circuit, whereby theelectric current is carried to-the movable member of the switch,hereinafter described. The stationaryimemher or contact plate 5 of theswitch consists of a flat metal plate of suitable size having on one endan extension 6 in which is arranged a binding screw 7 to which thecircuit wire4 is connected.

The contact plate 5'is loosely connected to ablock or base 8 ofinsulating material, preferably by securing to the underside of theplate a rock shaft 9, the ends of which project laterally a shortdistance beyond the oppositc edges of the plate, as shown. The I shaft 9is mounted in a groove 10 formed in the base 8 and is loosely secured atits opposite ends by washer plates 11 and screws 19..

a This form of mountlng for the contact plate 5 15 clearly shown in Fig.5 of the drawings.

7. In Fig. 8, is shown another modified form of contact mechanism, inwhich the In Fig. 0,

plate 5 is provided with a rock shaft 9 and is loosely held in positionat its ends by headed pins S)" which engage holes 9 formed in the plate,asshown.

Pivotally mounted at a suitable point on the casing or frame of theclock, is a mo'v able switch member 16 comprising a spring metal bar 17on one end of which is formed a rectangt'ilar head 18 having at onecorner an operating lug 19 and having formed thereon a curvedlongitudinally extending stop arm 20. On the free end of the bar 17 isarranged a contact block 21 which, when the switch member is moved backand forth, is adapted to be brought into and out of enson 5; 5145;;

block U1"- can n angle ement t0 the y", with tin,

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to the desired adjustment for actuating and releasing the switch' memberin the manner described. It will 'be understood that the operating pins27 and 28 on the gears 22 and ,23 are arranged almost opposite to theindicating fingers 26 on the outer ends of the shafts 24: of the gearsso that when the gears are turned by the setting wheels ll and 42 tobring the indicating fingers 26 to the desired position on their dials,it will be known that the operating pins on the gears are in the properposition for turning on or off the switch at the desired time. Byproviding the spring bearing arms 4L3, the setting wheels-41 and 42 arenormally held out of engagement with the gears 22 and 23 and saidsetting wheels are pressed normally into engagement with the gears whenthe latter are operated,

The setting wheels ll and a2 are preferably formed of wood fiber orsimilar insulating material and the clock casing may be arranged in acasing of suitable insulating material such as porcelain, wood fiber orthe like (not shown) to insure a perfect insulation from electriccurrents while setting or winding the clock, when in position in thecircuit.

From the foregoing description, taken in connection with theaccompanying drawings, the construction 'and operation of the inventionwill be readily understood" without requiring a more extendedexplanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of, the advantages of the invention, as defined appendedclaims. l

' Iaving thus described my invention,what I claim is:

1. In an electric time switch, the combination with a clock works, of aspring retracted switch member having an electrical connection with oneterniinal of an electric circuit, a pivotally mounted cont-act platehaving an electricalconnection with the other terminal of th circuit, acontact block carried by said swi ch member and adapted to be engagedwith said contact plate to complete the electric circuit, a switchoperating gear adapted to move said switch member into gagement withsaid contact plate, thereby closing the electric circuit, a stop armcarried by said switch member, a

match adapted to be engaged by said stop 'arm to hold the switch memberin closed position, a gear adapted to trip said catcln and releasesaid'switch member, a pinion slidably keyed to the hour hand shaft ofthe clock works, and adapted to normally engage and operate said gears,means to disengage said pinion from said gears, and means whereby thelatter are set to open and close the switch at the desired time.

in the 2. In an electricitime switch, the combination with clTck works,of a pivotally mounted spr ngiet-racted switch member, an

operating big on one end of said switch member, a stop arm carried bysaid member, a contact block on the freeend thereof, apivotallvfimounted contact plate arranged in said cloth and adapted tobe engaged by the contact block on said switch member, an elevatingspring adapted to be engaged by the contact block on said switch memberand to be elevated to a position for engagen'ient with said contactplate, a switch closing gear revolubly mounted in the clock, anoperating pin carried by said wheel and adapted to engage the operatinglug on said switch member, whereby the latter is moved to a closedposition, a spring retracted catch adapted to be engaged by the stop armon said switch member and to hold the latter iin closed position, arevolubly mounted gear,

an operating pin carried by said gear and adapted to trip said catch,thereby releasing said switch member, a spring to retract said member toan inoperative position when released from saidcatch, an operatingpinion mounted on the hour hand shaft of the clock and operativelyengaged with said gear-s to turn the same in proper direction to openand close the switch.

3. In a time switch, the combination with a clock arranged in andforming part of an electric circuit and having connected thereto anelectric plug, of a pivotally mounted switch member, a stationarycontact member adapted to be engaged by said switch member, a catch tohold'the switch member in engagement with said contact plate to closethe electric circuit, a gear adapted to move said switch to a closedposition and into engagement with said catch, a gear adapted to tripsaid catch and releasesaid switch, an operating pinion slidably keyed tothe hour hand shaft of the clock, and engaging said gears to operate thelatter in the proper direction, a shifting lever adapted to move saidpinion out of engagement with said gears whereby the latter may beadjusted without interfering with the operation of the clock, and springretracted set wheels adapted to be projected into engagement with saidgears whereby the latter are turned and set from the outside of theclock.

4. In a time switch, the con'il'iination with a clock, of aspringretracted switch member, a contact member comprising a plate having aloose pivotal coi'mection whereby when enarranged on the dial offleeting pointers arranged 0;; gears and pointing to en sud r mlswhereby the posirg devices on said gears my whereof I have hereunto setL resence of two subscrlblng wlt- CAREY 'E. BUNKER.

FAQTR disengaged from said 15

